Sometimes after a change a person molts, like a chicken or butterfly. The molt, often gives new wings, or a change in direction.
Passion is great while it lasts, but as you know, it cannot be forced. I too have a passion in cars, and develop engine management electronics as a hobby, and use b4a for user interface via BT. I stopped development to clean up a 20+ year mess of spare parts and cars. I am stuck, not sure I am going back. I just bought a Mazda with skyactive engine, it already does what I want. I have hopes of finding space back, to develop something new again too. I now have a similar problem, what to do next. I always had more ideas than time... My plan is to get out more, and travel. I may see things to get going again, if not I will enjoy the view, and meet interesting people.
I wish you the best, in a new beginning.